Question

z square + Z square is equal to 18 find the value of Z cube minus one upon Z cube using only positive value of Z - 1 upon Z​

Answer 1

Step-by-step explanation:

z^2+z^2=2z^2=18

z^2=9

z=3

{z-1/z}^3=(z^3+1/z^3)-3

8/3+3=17/3=z^3+1/z^3